Opponent is this hand is pretty much the table donkey - minraises AA preflop in the BB into a table full of limpers, then can't let go of it to the K6s guy that flopped two pair.
She seemed to like to call flop continuation bluffs to see if they would check the turn etc.
However, she bet what she had, I didn't see any ridiculous bluffs outta her. Just stupid play, sometimes lucky.

This board isn't overly scary, but I could be in trouble. I bet the flop obviously, then bet the turn lightly to not pot-commit myself, and would likely fold to a reraise here, and I don't think that she is drawing.

I have been the victim of several river overbluffs...one was the flopped nut flush...the other was the flopped nut straight (me with AA on a AKT board)...there have been a few missed flushes - but I called those with specific reads on the bluffer, so my experience has been that, from a generally unknown, it is not a bluff but an overbet from someone who either wants it to look that way (not this opponent) or someone who just doesn't know how to bet for value.

This was a toughie. Comments welcome. Particularly, How much to I bet on the turn (I think I was a little weak) and river, and of course your opinion on the call/fold.

Party Poker No-Limit Hold'em, $ BB (7 handed) FTR converter on zerodivide.cx

Hero ($22.70)
MP1 ($26.95)
MP2 ($16.35)
CO ($49.25)
Button ($29.60)
SB ($10.05)
BB ($24.10)

Preflop: Hero is UTG with K, K. SB posts a blind of $0.10.
Hero raises to $1.5, MP1 calls $1.50, 5 folds.

Flop: ($3.35) 7, 9, 9 (2 players)
Hero bets $2.5, MP1 calls $2.50.

Turn: ($8.35) 3 (2 players)
Hero bets $4, MP1 calls $4.

River: ($16.35) 3 (2 players)

River play and Results in white below:
Hero checks, MP1 is all-in ($18 ish), Hero folds.

Final Pot: $16.35

MP1 shows...
Outcome: MP1 wins $16.35.